Below is my take on the subject. The center is marked "Unicorn". This a reference to the recent discussions in the press and blogosphere indicating that Data Scientists are as hard to find as unicorns. Finally the mindset is changing that a team of people with complimentary skills is the course of action for most data driven organizations. Certainly some individuals might posses Computer Science, Statistics and Subject Matter Expertise. They are just very hard to find. Many Data Scientist job descriptions don't reflect this reality and so these positions go unfilled for six months or more.